package collection;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;

public class CollectionDemo4 {
    public static void main(String[] args) {
        Collection c1=new ArrayList();
//        Collection c1=new HashSet();
        c1.add("java");
        c1.add("c++");
        c1.add(".net");
        System.out.println("c1:"+c1);

        Collection c2=new ArrayList();
        c2.add("android");
        c2.add("ios");
        System.out.println("c2:"+c2);

        c1.addAll(c2);//list集合合并
        System.out.println("c1:"+c1);
        System.out.println("c2:"+c2);

        Collection c3=new ArrayList();
        c3.add("c++");
        c3.add("android");
        System.out.println("c3:"+c3);

        boolean contains=c1.containsAll(c3);
        System.out.println("包含所有："+contains);
        System.out.println("c1:"+c1);
        System.out.println("c3:"+c3);

        c1.retainAll(c3);//取交集
        System.out.println("c1:"+c1);
        System.out.println("c3:"+c3);

        c1.removeAll(c3);//删除共有元素
        System.out.println("c1:"+c1);
        System.out.println("c3:"+c3);
    }
}
